Sucking and compressing machine



Feb. 21, 1933. G. TAMURA SUCKING AND COMPRESSING MACHINE Filed Sept. 1l,1950 4 Sheets-Sheet l Feb. 21, 1933. G, TAMURA SUCKING AND COMPRESSINGMACHINE Filed Sept. 1l, 1930 4 Sheets-Sheet 2 /PW M ZF/v VEN 70 fs" 657Vnwo 72/vm/PA Feb. 2l, 1933. G TAMURA SUCKING AND COMPRESSING MACHINEFiled Sept. 1l, 1950 4 Sheets-Sheetl 3 Feb. 21, 1933. G, TAMURAIJCKIIQG4 AND COMPRESSING MACHINE 4 Sheets-Sheet 4 Filed sept. 11, 1930I/WE/v To@ GEA/TA R0LA UMa/PA yPatented Feb. 2,1, 1933 LUNITED STATES yGENTARO TAMURA, OF HIGASHIYODOKAWA-KU, OSAXA, JAPAN SUCKING ANDCOMPRESSING MACHINE Application led September 11, 1930. Serial No.481,323.

In the existing sucking and compressing machine which possesses arolling plunger and partition plate in a cylindrical casing, a partitionplate is provided, one end of whlch is fixed to a swingingplungersupported by a part of said cylindrical casing wall, and theother end of said partition plate is arranged to slide accuratel in aslit which. is grooved in the rolling p unger, and the inner hollow partof said casing 1s divided into two parts by the rolling plunger andpartition plate, and is made to carry out a sucking or compressingaction by rolllng the rolling plunger which is driven byl an eccentricshaft, along the inner side of said casing and in this way is compelledto decrease the capacity of the machine because of the unavoidabledecrease of space between the surface of the rolling plunger and theinner side of the casing.

This invention relates to an improvement in sucking and compressingmachines and has for its object the production of a machine which willnot only remove such defect as stated above, but one where the capacityof the machine will be greatly increased and where a more effectivesucking and compressing action will be produced.

The drawings annexed illustrate the machine and its details, as follows:

Figure 1 is a longitudinal sectional view of the machine.

Figure 2 is a transverse sectional view of the machine along line A-A ofFigure 1.

Figure 3 is a front view of the partition plate partly shown in section.

Figure 4 is a sectional view along the line B-B of Figure 3.

Figure 5 is a side view of the rolling plunger and partition plate.

Figure 6 is a sectional view along the line C-C of Figure 5.

Figures 7 8 and 9 are transverse sections 45 through the rolling plungershowing the changing positions of the rolling plunger while inoperation.

As .shown in the accompany/in drawings,

l designates the outer casing w ich is engaged by a side cover 2, whichconstitutes a 5o cover for the open side of the outer casing 1.

A cylindrical swinging plunger 3 which has a slit along its longitudinalcenter line, is fitted in the small cylinder 1b formed upon the top ofthe casing 1, and the swinging plunger 3 is adapted to be rotatedfreely, being held at both ends in bearing shaped round socketswhich'are formed in both side walls 2 and l of the casing.

A rolling plunger 5 is held on a crank shaft 60 6 provided with ball orroller bearings 7, which are supported by the roller bearings 8 and 9,or other suitable installations placed in both side walls of the casing.

A partition plate 10 is provided, one end of 65 it being made to slidein the slit 4 in the swinging plunger 3, and the other end of it isfixed to the rolling plunger 5. Both sides of the rolling plunger andpartition 'plate are extended to both inner surfaces of the casing Wall,and divide the inner space of large cylinder lEL into two parts 11 and12 as the rolling plunger engages the bottom of the casing 1.

A suction or intake port 13 and an exhaust 75 port 14 are provided atthe junction of the large cylinder 1a and small cylinder l", and a valve15 controls the delivery or exhaust port 14 which valve is normally heldclosed by a spiral spring 16.

As the crank shaft 6 is rotated in the direction illustrated in thefigures, the rolling plunger 5 will have a rolling motion on the innersurface of the casing, contacting very closely therewith from theposition shown in Figure 7 to the position in Figure 8, Figure 2 andFigure 9 in the order shown. The above mentioned rolling motion of therolling plunger ma be carried out perfectly, by making the di erencebetween the radius of 'the rolling lunger 5'aiid the inner radius of thelarge cy der 1' equal to the eccentricity of the crank shaft. A

During the rolling motion of the rolling 5 plun r, the partition plate10 will slide in the s 't 4 of swinging plunger 3, which will swingaccording to t e inclination of partition plate 10. As the rollingplunger 5 returns again 0 from the initial position illustrated inFigure 7 to the same position after rollingthrough the positions shownin Figure 8, Figure 2 and Figure 9 in the order named the chamber 11 inthe casin will be increased gradually and air (or anot er Huid) will besucked into the said chamber from port 13, and after the rolling plungerpasses over the port 13, said chamber 11 will be decreased and air inthe said space will be compressed. Then the compressed air is deliveredfrom tlie outlet port 14. The numeral 11 in the figures desi ates the.space constituting an intake c amber and the numeral 12 desi nates thespace constituting a compressing c amber.

Passages 17 and 18 are provided in the partition plate 10, and the upperports of these passa es are opened to the slit 4 on the upper side osaid lpartition plate,and the lower port of one of t ese passages 17 isopened to tlie intake or suction chamber 11, and the lower port of theother passage 18 is opened tothe compression chamber 12. As shown inFigures 3 and 4, the passage 17 communicating with the intake or sectionchamber will admit a flow from the suction chamber 11 to the slit 4, atthe saine time not permitting a counter flow because of the ball valve19 which will close the passage 17 by means of the spiral spring 20 oranother suitable valve arrangement. On the other hand, the passage 18which communicates with the compression chamber 12 will admit a flowfrom the slit 4 to tlie compression chamber but will not admit a counterflow, because of the ball valve 21 which is normally held closed bymeans of the spiral spring 22 or other suitable valve arrangement.

During the operating of the machine the partition plate 10 erforms abackward sliding motion in the s 't 4 and air will be sucked into .saidslit from suction chamber 11 through the passage 17, and on the contraryas the partition plate 10 performs a forward sliding motion in the slit4, air will be coinpressed in said slit, and be delivered to thecompression chamber 12'througl1 the assage 18. In this way as abovementione a low and high pressure whichv may otherwise be produced in theslit 4 will be neutralized, and a wasting resistance against the slidininotion of partition plate 10 in the direction of both forward andbackward movement will be eliminated.v Accordingly the driv' of therolling plunger is performed `amoot y. Furthermore, the capacity of themachine is increased, by adding the sucking and conipressing action kinthe slit 4, to the proper sucking and compressing action of the machine.

As illustrated in Figures 5 and 6, the circular grooves 23 and 24 areprovided in botli sides of the rolling lunger 5, close to thecircumference of said plunger, and several spring sockets 25, 26, 27 and28 are bored in the said grooves, in which are arranged the spiralsprings 29, 30,31 and 32. Then the packing rings 33, and 34 areinstalled in said circular grooves Also the upright grooves 35 and 36are formed in both sides of part-ition plate 10, and the lower ends ofsaid grtoves afre 1zlosed to thi circular d an 24 o t e rollingv p er,an are provided with the spring solzlzlits 37, 38, 39 and 40 in whichare mounted spiral springs 41, 42, 43 dand 44 for engaging t e packingbars 45 an 46.

When the rolling plunger with the partition plate has been installed inthe casing, the spiral'springs 29, 30, 31, 32, 41, 42, 43 and 44 will beslightly compressed, and the packings 33, 34, 45 and 46 will contactvery closely with the inside of the casing wall because of the elasticforce of said s rings. In this way, the plunger 5 and partition plate 10will be protected from wear, and also a perfect tit will be obtained toprevent leakage, between the suction and compression chambers While themachine is running.

This machine is not only used as an air compressor, as above mentionedbut it should be obvious that it may bemade available as a vacuum pumpand a compressing or sucking machine for any fluid, byeliminating thedelivery valve 15 which is situated on the delivery port 14, or leavingthe valve as it is, and if necessary, adding a suitable check valve inthe suction port 13. Furthermore, it is possible to utilize the newmachine as a prime mover, by attachment with or without a suitable valvearrangement to the suction and delivery port, and letting the deliveryport 14 be an inlet port for power generative gas or vapour such ascompressed air, steam, gas produced from any fuel, etc., and having therolling plunger driven by expansion of said gas in the casing.

In this invention, as above mentioned, the inner space of the casing isdivided into two parts by installing a rolling plunger and a partitionplate in said casing which performs a sucking or compressing action byclosely rolling the plunger along the inner surface of the casing. Thelower end of the partition plate is fixed to the rolling plunger whichis adapted to slide in the slit which is formed in the swinging plunger.Therefore, there is no necessity for providing a slit or guide in therolling plunger for the sliding of the partition plate, as r ed inexisting machines,

and it will not grooves 23,

necessary to reduce theA diameter of the plunger and the inner diameterof thecasing. Accordingly, a maximum amount of space may be provided inthe casing thereby increasing the capacity of the machine to aremarkable extent.

Furthermore, as the partition plate 10 is provided with twopassages 17and 18 communicating with each valve, which valves are adapted to permitonly entering or delivering of air, as already mentioned, the machinecan be run very smoothly, by neutralizing a high or lov;7 pressure whichmight otherwise be produced in the slit 4, during the operation of themachine.

One oi the important elements of this invention lies in the packingrings 33 and 34 which are provided on both sides of the rolling plunger,andthe packing bars 45 and 46 mounted on both sides ofthe partitionplate. By means of this structure the-suction or intake compartment 11is perfectly cut oi from the compression chamber 12, without causing theside surface of the plunger and partition plate to contact against theinner surface of the casing. Only the packing rings will engage theinner surface of the casing. The plunger and partition plate will inthis way be protected from Wear, and leakage will be prevented.

What I claim as new is:

1. A machine of the class described comprising a. c asing, a rollingplunger mounted therein., aswinging plunger mounted adjacent sa'idrolling plunger, intake and exhaust valves carried by said casing, apartition plate carried by said rolling plunger, said swinging plungerprovided with a slit formed therein for receiving said partition plate,said plate being slidably mo'unted within said slit, said intake andexhaust valves being independent of said partition plate, said partitiona plate dividing said casing into an intake compartment and acompression compartment, means formed in said partition plate forcontrolling the flow of pressure Jfrom said intake compartment to theslit formed in said swinging plunger and preventing the return flow ofpressure to said intake compartment, and* means formed in said partitionplate for controlling the flow of pressure from said slit in saidswingingl plunger to said compression compartment and preventing thereturn flow iom said compression compartment to said s it.

2. A machine 'of the class described comprising a casing, a rollingplunger mounted therein, a swinging plunger mounted adjacent saidrolling plunger, a partition plate carried by said rolling plunger andworking transversely through said swinging plunger, said partition platedividingl said casing into an intake and a compression compartment, saidpartition plate provided with a port for forming a communication betweensaid intake compartment and said swinging pl'ung- A specification. Y

GENTARO TAMURA.

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